This new edition provides an essential resource for students, teachers and practitioners of environmental law by including the updated text of the major laws and executive orders governing how agencies implement environmental policy. The supplement also includes significant Supreme Court decisions in cases decided since publication of the Eighth Edition of Environmental Regulation: Law, Science and Policy. New to the 2020-21 Edition: Edited copies of important new Supreme Court decisions interpreting the Clean Water Act (County of Maui v. Hawaii Wildlife Fund), the Comprehensive Environmental Response, Compensation and Liability Act (ARCO v. Christian), and the National Trails System Act (US Forest Service v. Cowpasture River Preservation Association) Edited copy of the Ninth Circuit’s long-awaited decision in the Juliana litigation challenging the federal government’s failure to protect future generations from climate change New Executive Orders from President Trump directing agencies to use the COVID-19 pandemic to dispense with environmental reviews and to suspend or repeal regulations to promote economic recovery A complete updating of the major federal environmental statutes, including amendments to the Freedom of Information Act, Safe Drinking Water Act, the Federal Insecticide, Fungicide and Rodenticide Act, the Toxic Substances Control Act, and Oil Pollution Act.